A torsion-resistant electrical cable

Abstract

The utility model relates to an anti-torsion electric wire and cable in the field of electric wire and cable, including the conductor core that is formed by the stranding of multiple conductors, the insulating layer that is tightly covered in the conductor core outside and the outer sheath that is covered in the insulating layer outside, still include the anti-torsion reinforcing layer that sets up between the insulating layer and the outer sheath, the insulating layer is consistent between the conductor core, the anti-torsion reinforcing layer is constituted by two or more and independent reinforcing strip, the reinforcing strip is continuously wound in the spiral mode along the surface of insulating layer, two or more reinforcing strip evenly distributes around the central axis of conductor core, the adjacent reinforcing strip is filled with flexible filler strip, and the flexible filler strip is tightly consistent with the reinforcing strip and the insulating layer, the outer sheath covers the anti-torsion reinforcing layer in, when torsion external force disappears, the structural stability of reinforcing strip and the elastic effect of flexible filler strip combine, can drive the cable gradually recovers to the original state.

Description

Technical Field

[0001] This utility model relates to the field of wires and cables, and in particular to a torsion-resistant wire and cable. Background Technology

[0002] As the core carriers of power transmission and signal transmission, wires and cables are widely used in many fields such as industrial manufacturing, construction engineering, transportation, and energy and chemical industry, and are an indispensable basic infrastructure in modern society. Their performance is directly related to the stable operation of power systems, the efficient transmission of communication signals, and the safe use of various equipment. Therefore, the structural design and performance optimization of wires and cables have always been the focus of industry research.

[0003] In practical applications, wires and cables often twist due to factors such as installation, operating environment, or external forces. However, the structural design of existing conventional wires and cables mainly focuses on basic properties such as insulation, abrasion resistance, and corrosion resistance, with relatively insufficient consideration for torsional resistance. When a cable is subjected to torsional force, the internal conductor core is prone to loosening, misalignment, or even breakage due to uneven stress. The insulation layer may also wrinkle and crack due to torsion, leading to a decrease in insulation performance and, in severe cases, causing safety hazards such as short circuits and leakage. Furthermore, existing cables often fail to self-correct after twisting, and the long-term accumulated torsional stress continuously damages the cable structure, significantly shortening its service life and causing numerous inconveniences for equipment operation and maintenance. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a torsion-resistant wire and cable, which can effectively solve the technical problem of lack of torsion resistance.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An anti-torsion wire and cable includes a conductor core formed by stranding multiple conductors, an insulation layer tightly covering the outside of the conductor core, and an outer sheath covering the outside of the insulation layer. It also includes an anti-torsion reinforcement layer disposed between the insulation layer and the outer sheath. The insulation layer is bonded to the conductor core. The anti-torsion reinforcement layer is composed of two or more independent reinforcing strips. The reinforcing strips are continuously wound in a spiral manner along the surface of the insulation layer. The two or more reinforcing strips are evenly distributed around the central axis of the conductor core. Flexible filler strips are filled between adjacent reinforcing strips. The flexible filler strips are tightly bonded to the reinforcing strips and the insulation layer. The extension direction of all reinforcing strips forms the same angle with the central axis of the cable. The outer sheath covers the anti-torsion reinforcement layer.

[0007] Furthermore, a reinforcing ring is provided between the outer sheath and the anti-torsion reinforcement layer. The reinforcing rings are distributed axially along the inner wall of the outer sheath and abut against the outer side of the anti-torsion reinforcement layer.

[0008] Furthermore, a buffer layer is provided between the conductor core and the insulating layer, and the buffer layer is made of an elastic material.

[0009] Furthermore, the outer sheath is provided with anti-slip texture on its outer side, and the anti-slip texture extends along the axial direction of the outer sheath.

[0010] Furthermore, the reinforcing strips of the anti-torsion reinforcement layer are made of elastic metal, and the surface of the reinforcing strips is covered with an anti-corrosion coating.

[0011] Furthermore, the reinforcing strips of the anti-torsion reinforcing layer are made of fiber composite material, and an adhesive layer is provided between the fiber composite material and the insulation layer.

[0012] Compared with existing technologies, the beneficial effects of this invention are: when the cable is subjected to torsional force, it can evenly distribute the torsional stress to each reinforcing strip, effectively resisting torsional deformation and preventing the conductor core from loosening or breaking due to excessive local stress. Simultaneously, it protects the insulation layer from torsional damage, maintaining good insulation performance. The flexible filler strip not only further disperses torsional stress but also provides elastic recovery force after the cable is torn. When the torsional force disappears, the structural stability of the reinforcing strip combined with the elastic effect of the flexible filler strip can gradually restore the cable to its original state, achieving a good reset effect, reducing the cumulative damage of torsional stress, and extending the cable's service life. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0014] Figure 2 This is the front view of the present invention;

[0015] Figure 3 This is a cross-sectional schematic diagram of the present invention;

[0016] The numbers in the diagram are: 1-Conductor core, 2-Insulation layer, 3-Outer sheath, 4-Reinforcing strip, 5-Flexible filler strip, 6-Reinforcing ring, 7-Buffer layer. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The following is combined with Figures 1-3 A detailed description of the torsion-resistant wire and cable of this utility model is provided below:

[0019] An anti-torsion wire and cable includes a conductor core 1 formed by stranding multiple conductors, an insulation layer 2 tightly covering the outside of the conductor core 1, and an outer sheath 3 covering the outside of the insulation layer 2. It also includes an anti-torsion reinforcement layer disposed between the insulation layer 2 and the outer sheath 3. The insulation layer 2 is bonded to the conductor core 1. The anti-torsion reinforcement layer is composed of two or more independent reinforcing strips 4. The reinforcing strips 4 are continuously wound in a spiral manner along the surface of the insulation layer 2. The two or more reinforcing strips 4 are evenly distributed around the central axis of the conductor core 1. A flexible filler strip 5 is filled between adjacent reinforcing strips 4. The flexible filler strip 5 is tightly bonded to the reinforcing strips 4 and the insulation layer 2. The extension direction of all reinforcing strips 4 forms the same angle with the central axis of the cable. The outer sheath 3 covers the anti-torsion reinforcement layer.

[0020] When the cable is subjected to torsional force, the flexible filler strip 5 evenly distributes the torsional stress to each reinforcing strip 4, effectively resisting torsional deformation and preventing the conductor core 1 from loosening or breaking due to excessive local stress. Simultaneously, it protects the insulation layer 2 from torsional damage, maintaining good insulation performance. The flexible filler strip 5 not only further disperses torsional stress but also provides elastic recovery force after the cable is torn. When the torsional force disappears, the structural stability of the reinforcing strip 4 combined with the elastic effect of the flexible filler strip 5 gradually restores the cable to its original state, achieving a good reset effect, reducing cumulative damage from torsional stress, and extending the cable's service life.

[0021] A reinforcing ring 6 is provided between the outer sheath 3 and the anti-torsion reinforcement layer. The reinforcing ring 6 is made of high-strength polyamide material and has an arc-shaped cross-section. The reinforcing ring 6 is axially spaced along the inner wall of the outer sheath 3 and abuts against the outer side of the anti-torsion reinforcement layer. The high-strength polyamide reinforcing ring 6 can significantly enhance the radial structural strength of the outer sheath 3 and reduce the radial contraction or expansion deformation of the outer sheath 3 when the cable is twisted. The arc shape can help the anti-torsion reinforcement layer to disperse torsional stress and prevent the outer sheath 3 from cracking due to excessive local stress. At the same time, it improves the synergistic anti-torsion ability of the outer sheath 3 and the anti-torsion reinforcement layer.

[0022] A buffer layer 7 is provided between the conductor core 1 and the insulation layer 2. The buffer layer 7 is made of nitrile rubber, which has excellent elasticity and wear resistance. It can effectively absorb the vibration and impact stress generated by the conductor core 1 during torsion, reducing the hard friction between the conductor core 1 and the insulation layer 2. The surface of the buffer layer 7 is uniformly distributed with micro-dimples. The micro-dimple structure can further enhance the deformation capacity of the buffer layer 7, enhance the buffering effect on the conductor core 1, prevent the conductor core 1 from loosening due to torsional stress, and protect the inner side of the insulation layer 2 from frictional damage caused by the conductor core 1.

[0023] The reinforcing strip 4 of the anti-torsion reinforcement layer can be made of elastic metal, and its surface is covered with an anti-corrosion coating, such as spring steel covered with an epoxy resin anti-corrosion coating. This can significantly improve the torsional load-bearing capacity and deformation recovery capacity of the reinforcing strip 4, ensuring that it can stably return to its original shape after torsion; the anti-corrosion coating can effectively isolate moisture and corrosive media, prevent the metal reinforcing strip 4 from rusting, extend the service life of the anti-torsion reinforcement layer, and ensure long-term stable torsional performance.

[0024] Furthermore, the reinforcing strip 4 of the anti-torsion reinforcement layer can be made of fiber composite material, with an adhesive layer between the fiber composite material and the insulation layer 2. For example, a glass fiber reinforced epoxy resin composite material can be used, with a polyurethane adhesive layer between it and the insulation layer 2. The glass fiber reinforced epoxy resin composite material has the characteristics of high strength, lightweight, and chemical corrosion resistance, which can reduce the overall weight of the cable while ensuring torsional strength. The polyurethane adhesive layer can enhance the tightness of the fit between the reinforcing strip 4 and the insulation layer 2, preventing relative sliding between the two during torsion, ensuring that the reinforcing strip 4 and the insulation layer 2 work together to resist torsional deformation, and improving the structural stability and efficiency of the anti-torsion reinforcement layer.

[0025] Furthermore, the outer sheath 3 is provided with anti-slip texture on its outer side. The anti-slip texture extends axially along the outer sheath 3 and has a continuous sawtooth structure, which can significantly increase the friction coefficient of the outer sheath 3 surface, making it easier to grip the cable during installation or maintenance and reducing accidental twisting or dragging damage caused by slippage. The axially extending texture design does not affect the bending performance of the cable, and at the same time can guide the direction of force during installation, reducing the risk of damage to the internal structure of the cable caused by human twisting during construction and improving construction safety.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A torsion-resistant electric wire cable comprising a conductor core formed by twisting a plurality of conductors, an insulating layer tightly covering the outside of the conductor core, and an outer sheath covering the outside of the insulating layer, characterized by: It also includes an anti-torsion reinforcement layer set between the insulation layer and the outer sheath. The insulation layer is bonded to the conductor core. The anti-torsion reinforcement layer is composed of two or more independent reinforcing strips. The reinforcing strips are continuously wound in a spiral manner along the surface of the insulation layer. The two or more reinforcing strips are evenly distributed around the central axis of the conductor core. Flexible filler strips are filled between adjacent reinforcing strips. The flexible filler strips are tightly bonded to the reinforcing strips and the insulation layer. The extension direction of all reinforcing strips is at the same angle to the central axis of the cable. The outer sheath covers the anti-torsion reinforcement layer.

2. The anti-torsion wire and cable according to claim 1, characterized in that: A reinforcing ring is provided on the inner side of the outer sheath. The reinforcing rings are distributed at intervals along the circumference of the outer sheath and abut against the outer side of the anti-torsion reinforcing layer.

3. The anti-torsion wire and cable according to claim 1, characterized in that: A buffer layer is provided between the conductor core and the insulation layer, and the buffer layer is made of an elastic material.

4. The torsion-resistant wire and cable according to any one of claims 1-3, characterized in that: The outer sheath is provided with anti-slip texture on the outside, and the anti-slip texture extends along the axial direction of the outer sheath.

5. The torsion-resistant wire and cable according to any one of claims 1-3, characterized in that: The reinforcing strips of the anti-torsion reinforcement layer are made of elastic metal, and the surface of the reinforcing strips is covered with an anti-corrosion coating.

6. The torsion-resistant wire and cable according to any one of claims 1-3, characterized in that: The reinforcing strips of the anti-torsion reinforcement layer are made of fiber composite material, and an adhesive layer is provided between the fiber composite material and the insulation layer.

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